import Vue from 'vue'
import Router from 'vue-router'

Vue.use(Router)

/* Layout */
import Layout from '@/layout'

/**
 * Note: sub-menu only appear when route children.length >= 1
 * Detail see: https://panjiachen.github.io/vue-element-admin-site/guide/essentials/router-and-nav.html
 *
 * hidden: true                   if set true, item will not show in the sidebar(default is false)
 * alwaysShow: true               if set true, will always show the root menu
 *                                if not set alwaysShow, when item has more than one children route,
 *                                it will becomes nested mode, otherwise not show the root menu
 * redirect: noRedirect           if set noRedirect will no redirect in the breadcrumb
 * name:'router-name'             the name is used by <keep-alive> (must set!!!)
 * meta : {
    roles: ['admin','editor']    control the page roles (you can set multiple roles)
    title: 'title'               the name show in sidebar and breadcrumb (recommend set)
    icon: 'svg-name'/'el-icon-x' the icon show in the sidebar
    breadcrumb: false            if set false, the item will hidden in breadcrumb(default is true)
    activeMenu: '/example/list'  if set path, the sidebar will highlight the path you set
  }
 */

/**
 * constantRoutes
 * a base page that does not have permission requirements
 * all roles can be accessed
 */
export const constantRoutes = [
  {
    path: '/login',
    component: () => import('@/views/login/index'),
    hidden: true
  },

  {
    path: '/404',
    component: () => import('@/views/404'),
    hidden: true
  },

  {
    path: '/',
    component: Layout,
    redirect: '/scoreInfo',
    children: [{
      path: 'scoreInfo',
      name: 'ScoreInfo',
      component: () => import('@/views/scoreInfo/index'),
      meta: { title: '成绩信息', icon: 'el-icon-s-data' }
    }]
  }
]

/**
 * asyncRoutes
 * the routes that need to be dynamically loaded based on user roles
 */
export const asyncRoutes = [
  {
    path: '/authority',
    component: Layout,
    redirect: '/authorityList',
    children: [{
      path: 'authorityList',
      name: 'Authority',
      component: () => import('@/views/authority/index'),
      meta: { title: '权限管理', icon: 'el-icon-s-help', roles: ['超级管理员'] }
    }]
  },
  {
    path: '/student',
    component: Layout,
    redirect: '/student/majors',
    name: 'Student',
    meta: { title: '学生信息管理', icon: 'el-icon-postcard', roles: ['超级管理员', '学生管理员'] },
    children: [
      {
        path: 'majors',
        component: () => import('@/views/student/majors'), // Parent router-view
        name: 'Majors',
        meta: { title: '专业管理' }
      },
      {
        path: 'class',
        component: () => import('@/views/student/class'), // Parent router-view
        name: 'Class',
        meta: { title: '班级管理' }
      },
      {
        path: 'subject',
        component: () => import('@/views/student/subject'), // Parent router-view
        name: 'Subject',
        meta: { title: '科目管理' }
      },
      {
        path: 'studentInfo',
        component: () => import('@/views/student/studentInfo'),
        name: 'StudentInfo',
        meta: { title: '学生管理' }
      }
    ]
  },
  {
    path: '/exam',
    component: Layout,
    redirect: '/exam/examList',
    children: [
      {
        path: 'examList',
        name: 'ExamList',
        component: () => import('@/views/exam/examList'), // Parent router-view
        meta: { title: '考试管理', icon: 'el-icon-edit', roles: ['超级管理员', '学生管理员'] }
      }
    ]
  },
  {
    path: '/problem',
    component: Layout,
    redirect: '/problem',
    meta: { title: '题库管理', icon: 'el-icon-document-copy', roles: ['超级管理员', '考试管理员'] },
    children: [
      {
        path: 'problemSingle',
        name: 'ProblemSingle',
        component: () => import('@/views/problem/problemSingle'),
        meta: { title: '单选题' }
      },
      {
        path: 'problemSelection',
        name: 'ProblemSelection',
        component: () => import('@/views/problem/problemSelection'),
        meta: { title: '多选题' }
      },
      {
        path: 'problemJudge',
        name: 'ProblemJudge',
        component: () => import('@/views/problem/problemJudge'),
        meta: { title: '判断题' }
      }
    ]
  },
  {
    path: '/recover',
    component: Layout,
    redirect: '/recover',
    meta: { title: '回收站', icon: 'el-icon-delete', roles: ['超级管理员', '考试管理员'] },
    children: [
      {
        path: 'problemSingle',
        name: 'reProblemSingle',
        component: () => import('@/views/recover/problemSingle'),
        meta: { title: '单选题' }
      },
      {
        path: 'problemSelection',
        name: 'reProblemSelection',
        component: () => import('@/views/recover/problemSelection'),
        meta: { title: '多选题' }
      },
      {
        path: 'problemJudge',
        name: 'reProblemJudge',
        component: () => import('@/views/recover/problemJudge'),
        meta: { title: '判断题' }
      }
    ]
  },

  // 404 page must be placed at the end !!!
  { path: '*', redirect: '/404', hidden: true }
]

const createRouter = () => new Router({
  mode: 'hash', // require service support
  // mode: 'history', // require service support
  scrollBehavior: () => ({ y: 0 }),
  routes: constantRoutes
})

const router = createRouter()

// Detail see: https://github.com/vuejs/vue-router/issues/1234#issuecomment-357941465
export function resetRouter() {
  const newRouter = createRouter()
  router.matcher = newRouter.matcher // reset router
}

export default router
